"Hey, Boo: Harper Lee & To Kill a Mockingbird" (82 minutes) premieres on the PBS series "American Masters" on Monday, April 2nd, at 10 p.m. (check local listings). The film is also available on-demand via Netflix and iTunes.

by Jeff Shannon

To Kill a Mockingbird was published on July 11th, 1960, and Harper Lee's first and only novel has been a publishing phenomenon ever since. Although its first printing by the venerable publishing house of J.B. Lippincott was a mere 5,000 copies, it was an immediate bestseller, and has consistently sold a million copies a year for over 50 years. It was a shoo-in for the Pulitzer Prize, and is frequently cited as the second-most beloved book of all time, after the Holy Bible. Some British librarians went a step further: In a 2006 poll, they ranked Mockingbird at the top, above the Bible, in a list of books "every adult should read before they die." Despite some early objections to its use of racial epithets (specifically the "N-word"), the novel has been required, if sometimes controversial, classroom reading for decades.

With its potent themes of racial injustice, inequality, courage, compassion and lost innocence in the noxiously segregated American South, Lee's novel preceded and fueled the civil rights movement that erupted in its wake. I don't think it's an exaggeration to say that To Kill a Mockingbird is the most influential novel of the 20th century, considered by many to be America's national novel. The equally beloved, Oscar-winning 1962 film version -- famously adapted by Horton Foote and directed by Robert Mulligan -- was immediately embraced as an enduring classic worthy of its source material.